Endomorphisms and Automorphisms of the Shift Dynamical Systems. - Gustav Arnold Hedlund (Math. Syst. Theory, 1969)

Sequences with Minimal Block Growth. - Ethan M. Coven; Gustav Arnold Hedlund (Math. Syst. Theory, 1973)

Periods of Some Nonlinear Shift Registers. - Ethan M. Coven; Gustav Arnold Hedlund (J. Comb. Theory A, 1979)